Two novel three dimensional neodymium adipates have been synthesized through hydrothermal techniques. Both GWMOF-1 (C6H8O4)(3)Nd-2(H2O2) and GWMOF-2 ((C6H8O4)(3)Nd-2(H2O) . H2O) are constructed of chains of edge-shared NdO8(H2O) polyhedra that are cross-linked by adipic acid molecules to form framework structures. The structures differ in the conformations of the acid chains and the resulting framework topologies. Both materials are thermally stable to approximately 370 degreesC. (C) 2004 Elsevier B.V. All rights reserved.